Induced voltage-based inverse estimation method for 2D magnetization distribution of permanent magnet mounted on SPMSM

Purpose This study aims to propose a permanent magnet (PM) magnetization estimation method that utilizes the induced voltage measured by a pickup coil. Design/methodology/approach To efficiently minimize the objective function, a gradient-based optimization method supported by the adjoint variable method is applied. Findings The estimation of PMs magnetization was successfully carried out. Furthermore, the reconstructed induced voltages were quite similar to the target distribution. Originality/value The estimation method for PM magnetization using induced voltage at pickup coil located on the airgap of surface permanent magnet synchronous motors derived from rotor rotation.